Wall-plug



A. TEN BOSCH.

WALL PLUG.

APPLICATION FILED OCT- 25. 1920.

2 SHEETSSHEET I.

Inn): for ,4 braJlaJu. (en Bosc /z Patented Aug. 16, 1921.-

A. TEN BOSCH.

WALL PLUG. APPLICATION FILED ocr. 25, 1920.

1,387,8 1 4;, Patented Aug. 16, 1921.

2 SHEETSSHEET 2- v Zhuenfor Abraham ten Bosch UNITED STATES PATENT OFFICE.

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- To all whom it ma camera:

. currents and more particularly to wall plugs including split pins.

' Prior to the present invention split pin plugs have been generally used in which the split in the pin was formed by sawcut butwith the known construction, the bending of the sections of the pin on the opposite sides of the saw cut eventually cause the metal of the pin to crystallize at the points of bending, and as a result the metal lost its resiliency and often broke at the point of bending.

To overcome this defect in the generally used plug the pins have been made of two separate halves which by means of a socket are fixed together at. the foot. With this construction there is'less liability of break age of the pins but there is the disadvantage that, when the pins are adjusted for a special contact socket difiiculties arise in arranging the contact pins by bending them from each other in order that they may fit a different socket.

The primary object of the present invention is to furnish an improved plug which will overcome the disadvantages inherent in the devices heretofore used.

Another object of thepresent invention is to furnish an improved plug in which the sections of each pin will be automatically forced apart to provide an efiicient contact between the pin and the wall of the socket into which'it is adapted to be inserted.

Another obi'ect is to furnish an improved plug of simp e and expensive construction, which will efiiciently operate during a long period of time and which is not likely to get out of order.

With the foregoing objects outlined, and with other objects in view which will appear as the description proceeds, the invention consists in .the novel features hereinafter described in detail, illustrated in the accompanying drawings and more particular]; pointed out in the appended claims.

olland on July 23, 1919,)

' apart.

.pins 2, and these springs in Figs. 3 and 4,

Specification of L t n Patented Aug. 16, 1921. Application filed October 25, 1920. Serial lle. 419,480.

Referring to the drawings:

of one form of the p ug forming the subjectmatter of the invention.

Fig. 2 is a transverse sectional view of the same.

Fig. '3 is a view similar to Fig. 1 but showa modification.

1g. 4 is a view similar modification.

Fig. 5-is a longitudinal sectional view of another form of'the invention.

F 1g. 6 is a transverse sectional view of the plu shown in F i 5.

F 1g. is a longitufinal sectional view of still another form of the invention.

In the embodiment of the invention illustrated 1n Figs. 1 and 2, 1 designates a holder or casing-formed of a suitable. insulating material which as shown is made of two to Fig. 2 of the 'halves or sections 1 and 1 that are conto form an internal chamber 1. Mounted in the chamber 1 are the inner ends of splitpins 2 and it will be noted that one half of each of the pins is provided with ears or lugs 3 which are connected to a ivot pin 4 that joins the two sections of t e pin and has its ends mounted in recesses in the two halves of the casing 1. An electric conduit 5 is connected to the inner end of one section of each pin 2.

A push rod 6 has a portion normally projecting beyond one end of the casing 1, and this push rod is provided with a fixed cross head 7 having wedges 8 at its ends which slide in the spaces 9 between the sections of the pins 2, .so that inward movement of the pin 6 will cause the wedges to force the outer ends of the sections of each pin 2 Springs 10 are arranged in' the The abutting facesof the sections of the holder are recessed in order chamber 1 between the walls thereof and the outer surfaces of certain sections of the actv in opposition to the wedges 8 and tend'to normally. force the outer ends of thesections of each pin toward one another. A coil spring 11 is arranged in the chamber 1 between a shoulder in said chamber and the cross-head 7 and this spring tends to force the wedges 8 toward the outer ends of the pins 2.

- In the embodiment of the invention shown the construction is substantially the same with the exception that two pivot pins 4 are employed for each pin 2, and that the cross-head 7 insteadof terminating in wedges is provided at its ends with rings 12 which engage the diverging inner ends of the sections of the pins 2.

With this construction when the plunger 6 is moved inwardly the collars will force the inner ends of the sections of each pin toward one another and this will cause the outer ends of the sections to move apart.

verging slots 13 and 14 and this will cause.

the inner ends of the sections of each pin to move toward one another while the. outer ends of said sections move apart.

In the construction shown in Figs. 1 to 6,; the plunger 6 is designed to be engaged by the wall of the socket in which the pins are inserted so that the insertion of the pins 2 into a wall socket will cause the pin 6 to abut against the wall of the socket and force the plunger 6 inwardly .to cause the sections of the pins to move apart and provide an eflicient contactwith the walls of the socket. I

In the embodiment of the invention shown in Fig. 7 the sections of each pin are normally forced apart by spring 16 and when the pins are inserted in a socket member, the

wall of the socket will tend to force the outer ends of the section of each pin toward one another and compress the spring. 16. After the pins have been placed in the sockets, the spring 16 will function to force the outer ends of the sections of the pins apart and mounted in said holder and having a portion projecting from the inner end of. the same, said pin consisting of a plurality of sections and one section being movable relatively to the other, and means cooperating with said pin to move the movablesection away from the other section of the pin andv including a portion adapted to be automatically actu-atedwhen the pin is inserted in a socket.

2. A wall plug including a plurality of split pins,-each pin consisting of a plurality of sections and one section of each pin being movable relatively to the other section, and

means for causing the outer ends of the pin sections to be moved apart when the pins are inserted in acontact socket, said means including a member adapted to be automatically actuated when the pins are inserted in a contact socket.

3. A wall plug including a holder, a pluralityof pins mounted in said holder and each consisting of a plurality of sections, one section of each pin being movable relatively to the other section of the pin, a crosshead cooperating with said pins to move the movable sections of the pins away from the other sections of said pins, and a sliding pin engageable with said cross-head and adapted to actuate the same when the first mentioned pins are inserted in a contact socket and the cross-head pin engages said contact socket.

In testimony whereof I afiix my signature. ABRAHAM TEN BOSCH. 

